Grabbed dndbeyond's source code

```
~/go/bin/sourcemapper -output ddb -jsurl https://media.dndbeyond.com/character-app/static/js/main.90aa78c5.js
```

ddb_main/tools/js/CharacterBuilder/components/PageSubHeader/PageSubHeader.tsx

@@ -0,0 +1,9 @@
+import React from "react";
+
+export default class PageSubHeader extends React.PureComponent {
+  render() {
+    const { children } = this.props;
+
+    return <div className="builder-page-subheader">{children}</div>;
+  }
+}